泛型

泛型有泛型参数，泛型类，泛型函数，泛型接口

public class Pair<T>{

    private T m;

    public T getM() {
        return m;
    }

    public void setM(T m) {
        this.m = m;
    }

    public <T> void show(T t){
        System.out.println(t);
    }

}

public interface fanxing<T> {

    void show(T t);

}